I have an R-Tech DC TIG with fixed Amp settings. I was recently capping off some 1in 3mm MS tube and struggled to control the puddle size as the piece heated up. I started with 80 amps which flowed well and allowed me to add filler 1.6mm rod at a comfortable rate, but the puddle starts to grow and get too big after maybe 5-6 dips of the rod. I don't have a foot pedal, so I tend to stop and knock back the amps. By the end of the weld I'm down to 60 amps.
n leiu of a foot pedal, is it a reasonable rule of thumb to work to that a small piece will need 20-25% less current once up to temp ? I'm trying to adopt a principle to give repeatable results.
n leiu of a foot pedal, is it a reasonable rule of thumb to work to that a small piece will need 20-25% less current once up to temp ? I'm trying to adopt a principle to give repeatable results.
